Re-ignitible match



Sept. 13, 1966 J. B. TIGRETT ETAL RE-IGNITIBLE MATCH Filed Dec. 9, 1965FIGS FIG.4

FIGZ

INVENTORS JOHN BURTON TIGRETT AND Voom-ns F. WIGAL BY 02% w KM ATTORNEYUnited States Patent 3,272,604 REJGNITIBLE MATCH .Iolin Burton Tigrettand Voorhis F. Wigal, both of Jackson, Tenn; said Wigai assignor to saidTigrett Filed Dec. a, 1965, Ser. No. 512,751 Claims. (Cl. 4442) Thisinvention relates to ignitible match compositions and, moreparticularly, to a match which is adapted for repeated ignition andextinguishment.

This application is a continuation-impart of co-pending applicationsSer. Nos. 166,051, 166,052, and 166,053, each having been filed Jan. 15,1962, which are now abandoned.

Heretofore, various ettorts have been made to develop a re-ignitiblematch which may be lit and put out innumerable times over an especiallyrelatively long life, with even burning during combustion. However, upto the present time, all such efforts have failed, and for one primaryreason, that being the lack of such match compositions to retainincorporated combustion rate modifying agents against inadvertentescape. The necessity of including agents having a low-burning velocityin such match compositions has long been appreciated, as the sameconduce to ease of ignition and extinguishment whereby the latter may beeasily accomplished by blowing ones breath on the ignited match or bywaving same in the air, as well as conducin-g to the evenness of burn-With a steady loss of such agents through undesired escape, the life ofthe match is critically reduced with increasing difiiculty, duringusage, in the striking, and extinguishing, and with uneven burning.Thus, the retention of such combustion rate modifiers is critical forthe effective operation of a re-ignitible match and to provide theexpected longevity of the same.

In the actual preparation and production of re-ignitible matchesheretofore certain solvents have been customarily utilized for theparticular binding agent used, such as cellulose nitrate, as well as forassisting in the general dispersing of the composition ingredients, andaccordingly, it was necessary to allow a relatively extensive dryingperiod for such compositions during which the solvent must migrate tothe surface and evaporate.

By such action the resultant plastic mass is riddled with a multiplicityof microscopic interstices representing channels, as it were, throughwhich the solvent migrated for ultimate evaporation. These tiny poresprovide ducts along which the combustion rate modifiers slowly escapeand thus the match is steadily deprived of this necessary ingredient sothat its effective life is being continuously reduced. In addition tothe steady diminution in the eflectiveness of the match, theunauthorized loss of the combustion rate modifiers into the surroundingatmosphere may create a health hazard, since many are poisonous, whileothers, though not poisonous, have an objectionable odor, which is verydispleasing. Furthermore, with the loss of such low-burning velocityagents a match upon ignition will burn with a violent rocket-like actionuntil consumed, being thus creative of a definite hazard to the user aswell as to the surroundings.

Therefore, is it an object of the present invention to provide are-ignitible match composition adapted to form a homogeneous solid masswherein combustion rate controlling agents are intimately and reliablyretained against untimely escape to render the match capable of constantignition, burning, and extinguishment properties over a relativelyextensive life.

It is another object of the present invention to provide a re-ignitiblematch comprising a combustible mass throughout which the activeingredients are evenly dis- "ice persed and in the production of whichthe heretofore accepted lengthy drying-out process is obviated.

It is a further object of the present invention to provide a matchcapable of repeated ignition incorporating as a dispersant a readilycombustible, liquid monomeric material, capable of polymerizing in situinto solid form for endowing the resultant mass with a densitysubstantially impenetrable to normally potentially escapable combustionrate modifying agents, whereby the same are retained against prematureloss.

It is an additional object of the present invention to provide are-i-gnitible match comprising a core, or relatively enriched axialwick, formed of a combustible nonporous mass wherein incorporatedcombustion rate con trolling agents are retained against prematureescape, which core is embedded within a combustible body devoid ofoxidizing agents, there being a sheath-forming member applied upon saidcombustible body.

It is a still further object of the present invention to provide are-ignitible match comprising a combustible non-porous mass whereinincorporated combustion rate controlling agents are reliably retainedagainst premature escape and with a combustible sheet-forming memberintimately engaged to the match composition and progressing throughoutthe match body, which sheet-forming member conduces to a strong physicalconstruction of the match.

It is a still further object of the present invention to provide amethod for economically and effectively producing re-ignitible matchesof the types described as having substantially non-porous character.

Other objects and details of the invention will be apparent from thefollowing description, when read in connection with the accompanyingdrawing, wherein FIGURE 1 is a top plan view of a match constructed inaccordance with and embodying the present invention.

FIGURE 2 is a vertical transverse sectional view taken on the line 22 ofFIGURE 1.

FIGURE 3 is an elevational view of another form of reignitible matchconstructed in accordance with and embodying the present invention.

FIGURE 4 is a horizontal transverse sectional view ftaken on the line 44of FIGURE 3.

FIGURE 5 is a front view of a further form of reignitible matchconstructed in accordance with and embodying the present invention.

FIGURE 6 is a transverse sectional view taken on the line 66 of FIGURE5.

FIGURE 7 is a vertical sectional view demonstrating the matchcomposition as applied upon the sheet-forming member prior .to the matchformation illustrated in FIGURE 6.

In essence, the present invention contemplates the development of acombustible mixture for forming a homogeneous hard mass adapted forconstituting the body of a re-ignitible match, which mixture in additionto including certain Well-known match ingredients, being an oxidizingagent, a combustion supporting agent, a combustion rate modifier, and abinder, also contains a normally liquid monomeric agent which serves asa dispersant for the various ingredients and is capable of polymerizingin situ for intimately embedding within the formed non-porous mass theformulation ingredients whereby escape of the combustion rate modifyingagents is substantially inhibited. Thus, this invention does notcomprehend the utilization, in preparation, of solvents which mustevaporate during match formation.

In general, the re-ignitible match of the present invention includes inintimate admixture, an oxidizing agent, or an oxygen supplyingsubstance, which may be any one heretofore well-known in this art, suchas, for instance, potassium chlorate, as well as other chlorates and perchlorates, as well as nitrates, such as otassium nitrate, le d nitrate,etc, and salts of chromic acid, as bichromates, etc. Also included inthe admixture as a relatively major component thereof is a combustionrate modifying agent, or what might be considered an agent of relativelylow burning velocity for controlling the rate of combustion of oxygenfrom the oxidizing agent or so-called oxygen supplying substance andbeing adapted to burn without leaving a residue. Suchcombustion-controlling agents include polymers of aldehydes, such asmetaldehyde, .and trioxane, as well as derivatives of ammonia, such as,hexarnethylene tetramine, and the like. It will be recognized thatcompounds of this type have a cooling effect so that despite therelatively high content of the oxidizing agent, the burning match may beextinguished readily as by blowing ones breath thereon or by waving samethrough the air. Additionally, such combustion rate controlling agentsconduce to ready ignition of the mat-ch upon being struck on a suitablesurface and promote even burning.

The composition of the present invention also comprises a combustionsupporting agent, or What might be considered an oxygen releasecatalyst, such as, particularly, manganese dioxide, and others, whichare equally known in the art. With the foregoing ingredients there isalso incorporated a binder which may be any suitable combustiblematerial such as, cellulose nitrate, which has been widely usedheretofore. Cellulose acetate is also a compound apt for use as a binderin the present instance. But, it must be particularly noted that withthe present invention the binder is not dissolved in a solvent, such ashas bee-n the practice to the present time.

There also may be included in the composition relatively small amountsof pentaerythritol and ferric sulfate which conduce to more evenburning, being agents for preventing irregular combustioncharacteristics.

Serving as a dispersant for the ingredients of the match to be formed isa liquid monomeric agent which will polymerize in situ, by catalyticaction, to form a solid, dense resin providing a homogeneous mass withinwhich the said ingredients are dispersed. The solid polymer so formedwill embed each particle of the formulation and thereby reliably retainthe same against premature escape or loss. Among the monomers suitablefor such purpose are monomethyl methacrylate, styrene, .acrylonitrile,methyl-acrylate, and the like. The polymers so formed will readily burnso that there is no interference by the resin with the desiredcombustible properties of the match. As will be more apparent below, itis to be especially noted that the match of the present invention doesnot require the utilization of a solvent, so that the resultant hardenedmass is devoid of the interstices or lacunae which have been heretoforedeveloped in match bodies produced from ingredients including a solvent.Thus, the match of the present invention does not provide the openingswhich conduce to the escape of the combustion controlling agent, whichlatter is thus locked tightly within the mass.

Referring now by reference characters to the drawings which illustratethe preferred embodiments of the present invention, A indicatesgenerally a homogeneous match body which is hard, being of relativelyhigh density comprising uniformly dispersed ingredients to be describedin detail below, and which body is covered with a thin film as indicatedat B, such as of regenerated cellulose, cellulose acetate, or such otherfilm material as will prevent the fiame from burning faster on the outersurface of the body than at the center. Films or coating materials forthis general purpose have been well known in the art, such as composedof polyvinyl acetate, polyvinyl chloride, etc.

Match bodies A formed in accordance with the present invention arecomprised of a 'geenral formula as follows:

Material: Parts by weight (approx.) Oxidizing agent 7 Combustion ratemodifying agent 8-10 Combustion supporting agent 1.5-2 Liquid monomer4.4-5.5 Binder 1.1 Monomer catalyst, and even-burning producing agents2.15-3.132

Thus the foregoing may be utilized for preparing matches having thedesired characteristics as described herein.

As an example only, the following formulation may be used for theproduction of a match body in accordance with the present invention (theingredients being set forth in correspondence to the above generalformula):

Material: Parts by weight (approx) Potassium chlorate 7 Metaldehyde l0Manganese dioxide 2 Mono-Methyl methacrylate 4.5 Cellulose nitrate 1.1

Benzoyl peroxide (catalyst for the acrylic monomer) .132 Pentaerythritol2.00 Ferric sulfate 1.00

Using the foregoing formulation for illustraitve purposes only, theprocedure for forming a match in accordance with the present inventionis as follows:

The cellulose nitrate is put into solution in the liquid monomer, ormono-methyl methacrylate in this instance, and then there is added thebenzoyl peroxide which serves as a catalyst for promoting thepolymerization of the monomer. With the cellulose nitrate thusdissolved, the other ingredients, being solid materials in finely-groundstate, that is, the potassium chlorate, metaldehyde, manganese dioxide,pentaerythritol, and ferric sulfate, are then mixed into the solutionwhich becomes increasingly plastic. The resulting mass may then beextruded through a suitable die for presentation in rod form. The rodsso formed are then wrapped in an impervious film such as, ofpolyethylene, which prevents evaporation of the monomer during curing,which is accomplished by conventional procedures. The polymerization maybe accelerated by well-known, so-called noncatalytic means, includingthe use of thermal or photochemical energy sources.

Upon curing, the impervious film will be removed and the rods may then.be cut in sections of pre-determined length to constitute the formedmatch bodies, such as indicated at A in the drawing.

The thin film B as above described is then applied upon the matchbodies.

It is to be noted that by virtue of the homogeneous character of matchbody A and the stable character thereof through the maximum retentivityobtained by the use of the monomer, the resultant match will be constantin its operative properties over a relatively extensive life. Thus, thematch of the present invention will ignite and be extinguishable withequal ease whether during its first usage or during any usage longsubsequent thereof; and throughout its long life will burn with an evenflame. During non-usage there will not be undesired escape of thecombustion rate modifying agent with attendant odoriferousness, hazardto health, and danger through relatively violent explosiveness. Matchesconstructed in accordance with the foregoing are endowed with thereliable operational qualities which have been, heretofore, fruitlesslysought by previous workers in this field. By virture of the intimateretention of the combustion rate modifying agent as provided in thepresent invention, an

ultimate remaining increment of a match constructed in accordance withthe present invention will ignite, burn and be extinguishable in thesame manner as the initial, fully-formed match.

As further examples of the basic formulation for the production of amatch body in accordance with the present invention by incorporatingvarious of the other abovementioned monomers, the following may benoted, all of which have substantiated in practice the efficacy of thisinvention:

Ethyl Methacrylate Monomer- Iso Butyl Methaerylate Monomer. StyreneMonomer Vinyl Acetate Monomer. Vinyl Chloride Monomer Another form ofthe present invention contemplates a reignitible match as indicated at Cincorporating a central axial core 1 surrounded by a combustible body 2,which latter in turn is encircled or encased in a sheath member 3.

The core mixture which is closely related in nature to match body Aabove described comprises in intimate admixture an oxidizing agent, suchas, for instance, potassium chlorate, as well as other chlorates andperchlorates, nitrates, bichromates, etc.; a combustion rate modifyingagent including polymers of aldehydes, such as, metaldehyde, andtrioxane, as well as derivatives of ammonia, such as, hexamethylenetetramine, and the like; a combustion supporting agent such as, forinstance, manganese dioxide; and a binder, as cellulose nitrate orcellulose acetate. The foregoing basic ingredients are, as aforesaid,all well-known in the art of matches. However, it is to be particularlynoted, as will be more evident hereinbelow, the binder is not dissolvedin a solvent as has been the practice heretofore. The combustiblemixture also includes, as a dispersant, a liquid monomeric agent whichwill polymerize in situ, by catalytic action, for forming a solid,homogeneous, non-porous mass, all as set forth above with respect tomatch body A.

The match core of the present invention may also include small amountsof agents conducing to more even burning such as, for instance,pentaerythritol and ferric sulfate. Combustible mixtures forre-ignitible match cores formed in accordance with the present inventionhave had the following general formula:

Material: Parts by weight (approx) Oxidizing agent 7 Combustion ratemodifying agent 5 Combustion supporting agent 2 Liquid monomer 4.8Binder 1.2 Monomer catalyst, and even-burning producing agents 2.144

As an example only, the following formulation may be used for theproduction of a core for a re-ignitible match in accordance with theforegoing formula (with the ingredients being set forth incorrespondence to the above formula).

6 Material: Parts by weight (approx.) Potassium chlorate 7 Metaldehyde 5Manganese dioxide 2 Mono-Methyl methacrylate 4.8-5.5 Cellulose nitrate1.2

Benzoyl peroxide (catalyst for the acrylic monomer) .144 Pentaerythritol1.00 Ferric sulfate Using the foregoing formula for illustrativepurposes only, the procedure for intimately admixing the ingredientsthereof is as follows:

The cellulose nitrate is put into solution in the liquid monomer, ormono-methyl methacrylate in this instance, and then there is added thebenzoyl peroxide which serves as a catalyst for promoting thepolymerization of the monomer. With the cellulose nitrate thusdissolved, the other ingredients, being solid materials in finely groundstate, that is, the potassium chlorate, metaldehyde, manganese dioxide,pentaerythritol, and ferric sulfate, are then mixed into the solutionwhich becomes increasingly plastic.

It is evident from the foregoing, the formulation for the aforesaidmatch cores is substantially the same as that for match body Ahereinabove described, so that the efficiency and reliability ofoperation of the liquid monomeric agents are as established hereinabove.

As will be shown hereinbelow, core 1 formed in accordance with theforegoing is adapted to being surrounded by a combustible body 2 whichmay be devoid of oxidizing agents and, hence, being less enriched thanthe core, will be less adapted for ease of ignition but will providesteady, even-burning characteristics. Combustible body 2 will be formedsubstantially of a combustion rate modifying agent, such as for example,metaldehyde, which will be retained against escape by a liquid monomericagent of the type utilized in the formation of the core. Heretofore,match constructions utilizing an encircling combustile body to a centralwickform portion, have been composed of a low-burning velocity agent anda binder, with the result that such agents have continuously escaped andthus rendered the body inadequate for its designed purpose.

Combustible body 2 formed in accordance with the present invention willhave the following general formula:

Material: Parts by weight (approx) Combustion rate modifying agent 10Liquid monomer 3 Binder 1.2 Monomer catalyst, and even-burning producingagents 2.09

As an example only, the following formulation may be used for theproduction of a combustible body for a re-ignitible match in accordancewith the foregoing formula (with the ingredients being set forth incorrespondence to the above formula).

Material Parts by weight (approx) Met-aldehyde 10 Cellulose nitrate 1.2

Mono-Methylmethacrylate monomer 3.0

Benzoyl peroxide (catalyst) .09 Boric acid 1.00

Trioxane 1.00

Using the foregoing formula for illustration purposes only, since themono-methylmethacrylate may be readily replaced by any of the otheraforesaid monomeric agents without in any way modifying thecharacteristics of the combustible body 2, the procedure for intimatelyadmixing the combustible body ingredients is as follows:

The cellulose nitrate is put into a solution in the liquid monomer, ormono-methylmethacrylate in this instance, and then there is added thebenzoyl peroxide which serves as a catalyst for promoting thepolymerization of the monomer. With the cellulose nitrate thusdissolved, the boric acid and the trioxane are then mixed into the solution which becomes increasingly plastic.

The now plastic core 1 and combustible body 2 are then extruded by acompound extruder so that the combustible body is disposed about thecentral core, Subsequent to the extruding operation the now integratedcore and body are then subject to conditions conductive to curing whichmay be accomplished by conventional procedures during which theerstwhile monomeric material in both the core and the combustible bodywill polymerize into a resin of high density and hardness. Thepolymerization may be accelerated by well-known, so-called non-catalyticmeans, including the use of thermal or photochemical energy sources.However, it is requisite that during the curing operation the monomer beprevented from escaping. Various expedients might be utilized to inhibitsuch escape such as, for example, the application of an impervious film,such as polyethylene, about the combustible body, which film preventsthe evaporation of the monomer or, if desired, the curing operation maybe undertaken in an autoclave under air pressure, or under inert gaspressure so as to repress the vapor pressure of the monomer to preventescape.

After curing, the impervious film, if used, is removed and the nowhardened rodlike sections are permanently covered with thin film 3, asof re-generated cellulose, cellulose acetate, or such other filmmaterial as will prevent the flame from burning faster on the outersurface of the body than at the center. Films or coating materials forthis general purpose have been well-known in the art, such as polyvinylacetate, polyvinyl chloride, etc. The now sheath-covered rods may be cutinto sections of predetermined length to constitute the formed matchbodies, there being preferably a slight taper at one end so as to exposethe core.

In view of the foregoing it will be noted that the core, indicated as 1in the drawing, incorporates oxidizing agents whereas the combustiblebody indicated at 2 is devoid of such agents. Thus, core 1 is adaptedfor ease of ignition and extinguishment with relation to the combustiblebody where as the latter being comprised substantially of combustionrate modifying agents conduces to steady, slow-burning of the match Awhen ignited. The boric acid and trioxane of the combustible body 2provide flame modifying properties as well as desired plasticity.

It is to be noted that the core and the combustible body are both of ahomogeneous character and being adapted for maximum retentivity byincorporation of the now polymerized monomer whereby the resultant matchwill be constant in its operative properties over a relatively extensivelife.

Referring now to FIGURES 5, 6, and 7, D generally indicates are-ignitible match which embodies the present invention, incorporating acombustible mixture as indicated at 4, which is applied upon a film orsheet-forming member 5, which latter is then rolled upon itself into abody of predetermined desired thickness. In its crosssection, which ispreferably annular, the body will thus be composed of alternating,continuous layers of the sheet-forming member 5 and said combustiblemixture 4, which layers are in general spiral form proceeding from thebody center along an ever-increasing radius.

Combustible mixture 4 is comprised of the same ingredients andcompounded in the same manner as the combustible core 1 herein abovedescribed. However, in the production of the same, the plastic masswithin which the ingredients are evenly dispersed, is not placed in anextruder as with core 2, but is spread onto, or otherwise applied, in arelatively thin layer upon a section of film 5, such as, a polymer ofethylene, but which may be of other polyolefins, such as, polypropylene,polybutylene, or combinations thereof; as well as of polystyrene, or ofa polyvinyl alcohol. Such films desirably have a thickness ofapproximately .001 inch, and are combustible, being a relatively highmolecular weight, wax-like material. The applied layer of thecombustible material will, preferably, have a thickness of about .01inch; said film being indicated at 5 in the drawings, and the appliedlayer of combustible material being designated 4. After application ofthe mixture 4 upon film 5, the latter is then immediately rolled uponitself into a tight roll to form an elongated body of annularcross-section wherein the said film and combustible mixture providealternating layers along companion spirals (FIGURE 6). The rolled bodyis then subjected to conditions conductive to curing which latter may beaccomplished by conventional procedures. During curing, the erstwhilemonomeric material will polymerize into a resin of high density andhardness and will, additionally, serve to unite the film and mixtureinto an integrated unit. The polymerization may be accelerated bywell-known, so-called noncatalytic means, including the use of thermalor photochemical enerszv sources.

After curing the now hard elongated body may be severed into sections ofpredetermined length which will constitute the finished match body, asindicated broadly at D in FIGURE 5.

The said match D by means of its unique construction will besubstantially physically stronger than re-ignitible matches developed tothe present time and will have cer tain other properties of extremecriticality for producing a match of the desired characteristics, suchas, for instance, all-owing the use of a relatively reduced amount ofcombustion rate modifier without diminution in the striking,extinguishing, and burning qualities of the match; and which thuspermits of a relatively increased concentration of the strikingingredients so as to enhance the sensitivity of the match. Furthermore,the material of construction of the film assists in combustion controland, being combustible, burns without leaving appreciable residue. Thus,matches constructed in accordance with the present invention may beeconomically produced, are durable throughout an extended life; andpossess qualities productive of constant operational characteristics.

It should be understood that changes and modifications in the formation,construction, arrangement, and combination of the parts of there-ignitible match may be made and substituted for those herein shownand disclosed without departing from the nature and principle of ourinvention.

Having thus described our invention, what we claim and desire to secureby Letters Patent is:

1. A re-ignitible match having a combustible portion comprising anoxidizing agent from the class consisting of chlorates, perchlorates,nitrates and chromates, a combustion rate modifying agent from the classconsisting of polymers of aldehydes and ammonia derivatives, acom-bustion supporting agent consisting of manganese dioxide, a binderfrom the class consisting of cellulose nitrate and cellulose acetate anda liquid monomeric agent capable of polymerizing in situ for forming adense nonaporous, homogeneous mass for dispersion therein of the matchingredients, said agent being from the class consisting of mono-methylmethacrylate, styrene, vinyl chloride, acrylonitrile, and methylacrylate, ethyl methacrylate, and iso butyl methacrylate.

2. A re-ignitible match as defined in claim 1 and further characterizedby a combustible body surrounding said combustible portion, saidcombustible body comprising a combustion rate modifying agent from theclass consisting of polymers of aldehydes and derivatives of ammonia anda liquid monomeric agent from the class consisting of mono-methylmethacrylate, styrene, vinyl chloride, acrylonitrile, and methylacrylate, vinyl chloride, ethyl methacrylate, and iso butylmethacrylate.

3. A re-ignitible match as defined in claim 2, and further characterizedby a film sheathingly surrounding said combustible body and being fromthe class consisting of re-generated cellulose and cellulose acetate,polyvinyl acetate and polyvinyl chloride.

4. A re-ignitible match as defined in claim 1 and further characterizedby a flat film from the class consisting of polyolefins, polystyrene andpolyvinyl alcohol, said combustible portion being dispersed on saidfilm, and said film with the combustible portion being provide thereonbeing spirially Wound, whereby said match is formed of alternatingsections of said film and said combustible portion.

5. A re-ignitible match as defined in claim 4 and further characterizedby said combustible body being approximately .()1 inch thick and thethickness of said film being approximately .001 inch thick.

6. A re-ignitible match as defined in claim 1, and further characterizedby the combustible agents, being even burning, from the class consistingof pentaerythritol and ferric sulfate.

7. A re-ignitible match as defined in claim 6, and further characterizedby a catalyst for the liquid monomeric agent from the class consistingof benzoyl peroxide.

8. A method for producing a re-ignitible match Which comprises providinga binder from the class consisting of cellulose nitrate and celluloseacetate, providing a liquid monomer capable of polymerizing in situ saidmonomer being from the class consisting of mono-methyl methacrylate,styrene, vinyl chloride, acrylonitrile, and methyl acrylate, ethylmethacrylate, and iso butyl methacrylate, dissolving the binder in saidmonomer, providing in ground form, a solid oxidizing agent from theclass consisting of chlorates, perchlorates, nitrates, and chromates, asolid combustion rate modifying agent from the class consisting ofpolymers of aldehydes and ammonia derivatives, and a solid combustionsupporting agent consisting of manganese dioxide, and adding said groundagents to the solution, then mixing said solution for forming a firstplastic mass, shaping said plastic mass into predetermined form,Wrapping said shaped mass in an impervious film, then curing saidplastic mass into a dense, hard mass, and then cutting said hard massinto sections of predetermined size.

9. A method for producing a re-ignitible match having a combustibleportion, and a sheet surrounding said body, which method comprisesproviding a binder from the class consisting of cellulose nitrate andcellulose acetate, providing a liquid monomer capable of polymerizing insitu said monomer being from the class consisting of mono-methylmethacrylate, styrene, vinyl chloride, acrylonitrile, and methylacrylate, ethyl methacrylate, and iso butyl methacrylate, dissolving thebinder in said monomer, providing in ground form, a solid oxidizingagent from the class consisting of chlorates, perchlorates, nitrates,and chromates, a solid combustion rate modifying agent from the classconsisting of polymers of aldehydes and ammonia derivatives, and a solidcombustion supporting agent consisting of manganese dioxide, and addingsaid ground agents to the solution, then mixing said solution forforming a first plastic mass, then dissolving the binder in saidmonomer, providing a plasticity producing agent, providing an evencombustion producing agent from the class consisting of boric acid andtrioxane and mixtures of the same, and adding said agents to thesolution, then mixing said solution for forming a second plastic mass,then extruding said first and second plastic masses so that the secondmass will surround the first mass, then subjecting said concentric firstand second masses to conditions conducive to curing, then wrapping thecured masses by a sheath-forming film, and then cutting saidsheath-covered masses to sections of predetermined size.

10. A method for producing a re-ignitible match comprising providing aplastic mass comprised of an oxidizing agent from the class consistingof chlorates, perchlorates, nitrates, and chromates, combustion ratemodifying agent from the class consisting of polymers of aldehydes andammonia derivatives, a combustion supporting agent consisting ofmanganese dioxide, a binder from the class consisting of cellulosenitrate and cellulose acetate, and a normally liquid monomericdispersant capable of polymerizing in situ, said monomer being from theclass consisting of monomethyl methacrylate, styrene, vinyl chloride,acrylonitrile, and methyl ac-rylate, ethyl methacrylate, and iso butylmethacrylate, providing a section of film from the class consisting ofpolyolefins and combinations thereof, and polyvinyl alcohols, spreadingthe plastic mass upon the film section to a predetermined thickness,then rolling the mass of applied film upon itself to a tight roll sothat the mass and film form oompanion spiral sections proceeding fromthe center of the body, then curing the plastic mass for integrating thebody into a cohesive unit and then cutting the now cured body intosections of predetermined length.

References Cited by the Examiner UNITED STATES PATENTS 1,056,177 3/ 1913Humphrey 4446 2,093,516 9/ 1937 Foldi et a1. 4442 2,568,285 9/ 1951Knutsson-Hall 4448 2,743,580 5/1956 Loeb 4439 X FOREIGN PATENTS 230,5231/ 1959 Australia.

230,554 9/ 1960 Australia.

510,169 8/1920 France.

DANIEL E. WYMAN, Primary Examiner. C. F. DEES, Assistant Examiner.

1. A RE-IGNITIBLE MATCH HAVING A COMBUSTIBLE PORTION COMPRISING AN OXIDIZING AGENT FROM THE CLASS CONSISTING OF CHLORATES, PERCHLORATES, NITRATES AND CHROMATES, A COMBUSTION RATE MODIFYING AGENT FROM THE CLASS CONSISTING OF POLYMERS OF ALDEHYDES AND AMMONIA DERIVATIVES, A COMBUSTION SUPPORTING AGENT CONSISTING OF MANGANESE DIOXIDE, A BINDER FROM THE CLASS CONSISTING OF CELLULOSE NITRATE AND CELLULOSE ACETATE AND A LIQUID MONOMERIC AGENT CAPABLE OF POLYMERIZING IN SITU FOR FORMING A DENSE NON-POROUS, HOMOGENEOUS MASS FOR DISPERSION THEREIN OF THE MATCH INGREDIENTS, SAID AGENT BEING FROM THE CLASS CONSISTING OF MONO-METHYL METACRYLATE, STYRENE, VINYL CHLORIDE, ACRYLONITRILE, AND METHYL ACRYLATE, ETHYL METHACRYLATE, AND ISO BUTYL METHACRYLATE. 